> Sound.SC3.UGen.Help.viewSC3Help "BHiPass4"
    > :t bHiPass4

> import Sound.SC3 {- hsc3 -}

> g_01 =
>     let i = mix (saw AR (mce [0.99, 1, 1.01] * 440) * 0.3)
>         f = mouseX KR 20 20000 Exponential 0.2
>         rq = mouseY KR 0.1 1 Linear 0.2
>     in bHiPass4 i f rq